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The Colour Spectrum Handbook
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09 February 2027

A comprehensive multisensory guide to colour, exploring the emotion, symbolism, psychology, design applications, cultural meaning and sound of every hue.
Step into the extraordinary world of colour with The Colour Spectrum Handbook. This immersive guide reveals the emotional, psychological and cultural power of every hue, offering a unique fusion of visual, auditory and creative insight. Whether you're an artist, designer, illustrator, musician or simply fascinated by colour, you can read the book from beginning to end or dip into any shade that captures your imagination.
Each entry is dedicated to a single colour, presenting its name and colour codes alongside its emotional qualities, symbolic meanings, psychological impact, design applications and cultural associations. You'll also discover its natural sound connections, frequency and wavelength ranges, RGB and CMYK values, and harmonious colour combinations. QR codes provide access to specially curated music that reflects the mood and character of each hue, creating a truly multisensory experience.
From vivid hues to subtle shades, The Colour Spectrum Handbook explores the full palette in remarkable depth, concluding with a dedicated sound archive. Both an inspiring reference and a creative companion, it uncovers the hidden language of colour and offers a fresh perspective on how colour influences the way we see, feel, hear and create.
Sian Keogh is a design practitioner with over three decades of experience and a lifelong passion for color. A graduate of Ravensbourne School of Art, UK, she is known for her intuitive approach to color selection and her ability to create palettes that communicate mood and emotion with clarity and depth.
Bili Keogh is a sound designer and recent graduate of the Royal Central School of Speech and Drama in London. With experience working on numerous productions in the West End, Bili brings a strong creative sensibility and a collaborative approach to sound, shaping immersive auditory experiences that support story and atmosphere.